Spectroelectrochemical analysis of HOPG surface controlled modification

Autores
Franceschini, Esteban Andrés; Lacconi, Gabriela Ines
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In situ Raman spectroscopy is used to characterize the changes induced by electrochemical oxidation and silver electrodeposition at the step-edge and terrace sites of highly-oriented pyrolytic graphite (HOPG) surfaces. Ag crystallites are observed to become preferentially deposited onto previously oxidized step edges, thereby leading to an enhancement of the Raman active modes of the HOPG surface. Ex situ Raman spectra recorded after HOPG oxidation exhibit clear differences for both terrace and step-edge areas of the surface. An increase of D and D́ band intensity and two well-defined D-band contributions, D1 (at 1324 cm−1) and D2 (at 1344 cm−1), are the main features observed after oxidation. This effect can be correlated with the presence of step-edge sites on the surface, and are found to be strongly dependent on the pH of the solution used in the surface electrochemical oxidation experiments.
Fil: Franceschini, Esteban Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Lacconi, Gabriela Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
Materia
ELECTROCHEMICAL OXIDATION
HOPG STEP EDGES
SERS
SILVER ELECTRODEPOSITION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60995
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/60995
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Spectroelectrochemical analysis of HOPG surface controlled modificationFranceschini, Esteban AndrésLacconi, Gabriela InesELECTROCHEMICAL OXIDATIONHOPG STEP EDGESSERSSILVER ELECTRODEPOSITIONhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In situ Raman spectroscopy is used to characterize the changes induced by electrochemical oxidation and silver electrodeposition at the step-edge and terrace sites of highly-oriented pyrolytic graphite (HOPG) surfaces. Ag crystallites are observed to become preferentially deposited onto previously oxidized step edges, thereby leading to an enhancement of the Raman active modes of the HOPG surface. Ex situ Raman spectra recorded after HOPG oxidation exhibit clear differences for both terrace and step-edge areas of the surface. An increase of D and D́ band intensity and two well-defined D-band contributions, D1 (at 1324 cm−1) and D2 (at 1344 cm−1), are the main features observed after oxidation. This effect can be correlated with the presence of step-edge sites on the surface, and are found to be strongly dependent on the pH of the solution used in the surface electrochemical oxidation experiments.Fil: Franceschini, Esteban Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Comisión Nacional de Energía Atómica; ArgentinaFil: Lacconi, Gabriela Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; ArgentinaElsevier Science2017-04-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60995Franceschini, Esteban Andrés; Lacconi, Gabriela Ines; Spectroelectrochemical analysis of HOPG surface controlled modification; Elsevier Science; Applied Surface Science; 400; 14-4-2017; 254-2610169-4332CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2016.12.115info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169433216328355info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:30Zoai:ri.conicet.gov.ar:11336/60995instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:51:30.931CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spectroelectrochemical analysis of HOPG surface controlled modification
title Spectroelectrochemical analysis of HOPG surface controlled modification
spellingShingle Spectroelectrochemical analysis of HOPG surface controlled modification
Franceschini, Esteban Andrés
ELECTROCHEMICAL OXIDATION
HOPG STEP EDGES
SERS
SILVER ELECTRODEPOSITION
title_short Spectroelectrochemical analysis of HOPG surface controlled modification
title_full Spectroelectrochemical analysis of HOPG surface controlled modification
title_fullStr Spectroelectrochemical analysis of HOPG surface controlled modification
title_full_unstemmed Spectroelectrochemical analysis of HOPG surface controlled modification
title_sort Spectroelectrochemical analysis of HOPG surface controlled modification
dc.creator.none.fl_str_mv Franceschini, Esteban Andrés
Lacconi, Gabriela Ines
author Franceschini, Esteban Andrés
author_facet Franceschini, Esteban Andrés
Lacconi, Gabriela Ines
author_role author
author2 Lacconi, Gabriela Ines
author2_role author
dc.subject.none.fl_str_mv ELECTROCHEMICAL OXIDATION
HOPG STEP EDGES
SERS
SILVER ELECTRODEPOSITION
topic ELECTROCHEMICAL OXIDATION
HOPG STEP EDGES
SERS
SILVER ELECTRODEPOSITION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In situ Raman spectroscopy is used to characterize the changes induced by electrochemical oxidation and silver electrodeposition at the step-edge and terrace sites of highly-oriented pyrolytic graphite (HOPG) surfaces. Ag crystallites are observed to become preferentially deposited onto previously oxidized step edges, thereby leading to an enhancement of the Raman active modes of the HOPG surface. Ex situ Raman spectra recorded after HOPG oxidation exhibit clear differences for both terrace and step-edge areas of the surface. An increase of D and D́ band intensity and two well-defined D-band contributions, D1 (at 1324 cm−1) and D2 (at 1344 cm−1), are the main features observed after oxidation. This effect can be correlated with the presence of step-edge sites on the surface, and are found to be strongly dependent on the pH of the solution used in the surface electrochemical oxidation experiments.
Fil: Franceschini, Esteban Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Comisión Nacional de Energía Atómica; Argentina
Fil: Lacconi, Gabriela Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
description In situ Raman spectroscopy is used to characterize the changes induced by electrochemical oxidation and silver electrodeposition at the step-edge and terrace sites of highly-oriented pyrolytic graphite (HOPG) surfaces. Ag crystallites are observed to become preferentially deposited onto previously oxidized step edges, thereby leading to an enhancement of the Raman active modes of the HOPG surface. Ex situ Raman spectra recorded after HOPG oxidation exhibit clear differences for both terrace and step-edge areas of the surface. An increase of D and D́ band intensity and two well-defined D-band contributions, D1 (at 1324 cm−1) and D2 (at 1344 cm−1), are the main features observed after oxidation. This effect can be correlated with the presence of step-edge sites on the surface, and are found to be strongly dependent on the pH of the solution used in the surface electrochemical oxidation experiments.
publishDate 2017
dc.date.none.fl_str_mv 2017-04-14
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/60995
Franceschini, Esteban Andrés; Lacconi, Gabriela Ines; Spectroelectrochemical analysis of HOPG surface controlled modification; Elsevier Science; Applied Surface Science; 400; 14-4-2017; 254-261
0169-4332
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60995
identifier_str_mv Franceschini, Esteban Andrés; Lacconi, Gabriela Ines; Spectroelectrochemical analysis of HOPG surface controlled modification; Elsevier Science; Applied Surface Science; 400; 14-4-2017; 254-261
0169-4332
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apsusc.2016.12.115
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169433216328355
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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